G2

主要用于绘制 3D 散点图，利用点的粒度来分析数据的分布情况。

开始使用

首先需要使用 @antv/g-webgl 作为渲染器并注册以下两个插件：

g-plugin-3d 提供 3D 场景下的几何、材质和光照
g-plugin-control 提供 3D 场景下的相机交互

然后设置 z 通道、scale 和 z 坐标轴，最后在场景中添加光源。

import { Runtime, corelib, extend } from '@antv/g2';
import { threedlib } from '@antv/g2-extension-3d';
import { CameraType } from '@antv/g';
import { Renderer as WebGLRenderer } from '@antv/g-webgl';
import { Plugin as ThreeDPlugin, DirectionalLight } from '@antv/g-plugin-3d';
import { Plugin as ControlPlugin } from '@antv/g-plugin-control';

const renderer = new WebGLRenderer();
renderer.registerPlugin(new ControlPlugin());
renderer.registerPlugin(new ThreeDPlugin());

const Chart = extend(Runtime, {
  ...corelib(),
  ...threedlib(),
});

// 初始化图表实例
const chart = new Chart({
  container: 'container',
  renderer,
  width: 500,
  height: 500,
  depth: 400,
});

chart
  .point3D()
  .data({
    type: 'fetch',
    value:
      'https://gw.alipayobjects.com/os/bmw-prod/2c813e2d-2276-40b9-a9af-cf0a0fb7e942.csv',
  })
  .encode('x', 'Horsepower')
  .encode('y', 'Miles_per_Gallon')
  .encode('z', 'Weight_in_lbs')
  .encode('color', 'Cylinders')
  .encode('shape', 'cube')
  .coordinate({ type: 'cartesian3D' })
  .scale('x', { nice: true })
  .scale('y', { nice: true })
  .scale('z', { nice: true })
  .legend(false)
  .axis('x', { gridLineWidth: 2 })
  .axis('y', { gridLineWidth: 2, titleBillboardRotation: -Math.PI / 2 })
  .axis('z', { gridLineWidth: 2 });

chart.render().then(() => {
  const { canvas } = chart.getContext();
  const camera = canvas.getCamera();
  camera.setPerspective(0.1, 5000, 45, 500 / 500);
  camera.setType(CameraType.ORBITING);

  // Add a directional light into scene.
  const light = new DirectionalLight({
    style: {
      intensity: 3,
      fill: 'white',
      direction: [-1, 0, 1],
    },
  });
  canvas.appendChild(light);
});

更多的案例，可以查看图表示例页面。

选项

目前 point3D 有以下几个内置 shape 图形，包含 3D 和 2D：

图形	描述	示例
cube	绘制立方体
sphere	绘制球体
hollow	绘制空心圆
hollowDiamond	绘制空心钻石
hollowHexagon	绘制空心六边形
hollowSquare	绘制空心方块
hollowTriangleDown	绘制空心向下三角形
hollowTriangle	绘制空心三角形
hollowBowtie	绘制空心蝴蝶结
point	绘制圆
plus	绘制加号
diamond	绘制钻石
square	绘制方块
triangle	绘制三角形
triangleDown	绘制向下三角形
hexagon	绘制六边形
cross	绘制交叉符号
bowtie	绘制蝴蝶结
hyphen	绘制连字符
line	绘制竖线
tick	绘制 tick

使用球体效果如下：

import { Runtime, corelib, extend } from '@antv/g2';
import { threedlib } from '@antv/g2-extension-3d';
import { CameraType } from '@antv/g';
import { Renderer as WebGLRenderer } from '@antv/g-webgl';
import { Plugin as ThreeDPlugin, DirectionalLight } from '@antv/g-plugin-3d';
import { Plugin as ControlPlugin } from '@antv/g-plugin-control';

const renderer = new WebGLRenderer();
renderer.registerPlugin(new ControlPlugin());
renderer.registerPlugin(new ThreeDPlugin());

const Chart = extend(Runtime, {
  ...corelib(),
  ...threedlib(),
});

// 初始化图表实例
const chart = new Chart({
  container: 'container',
  renderer,
  width: 500,
  height: 500,
  depth: 400,
});

chart
  .point3D()
  .data({
    type: 'fetch',
    value:
      'https://gw.alipayobjects.com/os/bmw-prod/2c813e2d-2276-40b9-a9af-cf0a0fb7e942.csv',
  })
  .encode('x', 'Horsepower')
  .encode('y', 'Miles_per_Gallon')
  .encode('z', 'Weight_in_lbs')
  .encode('color', 'Cylinders')
  .encode('shape', 'sphere')
  .coordinate({ type: 'cartesian3D' })
  .scale('x', { nice: true })
  .scale('y', { nice: true })
  .scale('z', { nice: true })
  .legend(false)
  .axis('x', { gridLineWidth: 2 })
  .axis('y', { gridLineWidth: 2, titleBillboardRotation: -Math.PI / 2 })
  .axis('z', { gridLineWidth: 2 });

chart.render().then(() => {
  const { canvas } = chart.getContext();
  const camera = canvas.getCamera();
  camera.setPerspective(0.1, 5000, 45, 500 / 500);
  camera.setType(CameraType.ORBITING);

  // Add a directional light into scene.
  const light = new DirectionalLight({
    style: {
      intensity: 3,
      fill: 'white',
      direction: [-1, 0, 1],
    },
  });
  canvas.appendChild(light);
});

而在使用 2D 图形时，无需添加光源：

import { Runtime, corelib, extend } from '@antv/g2';
import { threedlib } from '@antv/g2-extension-3d';
import { CameraType } from '@antv/g';
import { Renderer as WebGLRenderer } from '@antv/g-webgl';
import { Plugin as ThreeDPlugin } from '@antv/g-plugin-3d';
import { Plugin as ControlPlugin } from '@antv/g-plugin-control';

const renderer = new WebGLRenderer();
renderer.registerPlugin(new ControlPlugin());
renderer.registerPlugin(new ThreeDPlugin());

const Chart = extend(Runtime, {
  ...corelib(),
  ...threedlib(),
});

// 初始化图表实例
const chart = new Chart({
  container: 'container',
  renderer,
  width: 500,
  height: 500,
  depth: 400,
});

chart
  .point3D()
  .data({
    type: 'fetch',
    value:
      'https://gw.alipayobjects.com/os/bmw-prod/2c813e2d-2276-40b9-a9af-cf0a0fb7e942.csv',
  })
  .encode('x', 'Horsepower')
  .encode('y', 'Miles_per_Gallon')
  .encode('z', 'Weight_in_lbs')
  .encode('color', 'Cylinders')
  .encode('shape', 'triangle')
  .coordinate({ type: 'cartesian3D' })
  .scale('x', { nice: true })
  .scale('y', { nice: true })
  .scale('z', { nice: true })
  .legend(false)
  .axis('x', { gridLineWidth: 2 })
  .axis('y', { gridLineWidth: 2, titleBillboardRotation: -Math.PI / 2 })
  .axis('z', { gridLineWidth: 2 });

chart.render().then(() => {
  const { canvas } = chart.getContext();
  const camera = canvas.getCamera();
  camera.setPerspective(0.1, 5000, 45, 500 / 500);
  camera.setType(CameraType.ORBITING);
});

3D 图形

属性	描述	类型	默认值
fill	图形的填充色	`string` \| `Function<string>`	-
opacity	图形的整体透明度	`number` \| `Function<number>`	-
cursor	鼠标样式。同 css 的鼠标样式，默认 'default'。	`string` \| `Function<string>`	'default'

其他的 point3D 图形配置项和 cube 一致。

2D 图形

属性	描述	类型	默认值
fill	图形的填充色	`string` \| `Function<string>`	-
fillOpacity	图形的填充透明度	`number` \| `Function<number>`	-
stroke	图形的描边	`string` \| `Function<string>`	-
strokeOpacity	描边透明度	`number` \| `Function<number>`	-
lineWidth	图形描边的宽度	`number` \| `Function<number>`	-
lineDash	描边的虚线配置，第一个值为虚线每个分段的长度，第二个值为分段间隔的距离。lineDash 设为[0, 0]的效果为没有描边。	`[number,number]` \| `Function<[number, number]>`	-
opacity	图形的整体透明度	`number` \| `Function<number>`	-
shadowColor	图形阴影颜色	`string` \| `Function<string>`	-
shadowBlur	图形阴影的高斯模糊系数	`number` \| `Function<number>`	-
shadowOffsetX	设置阴影距图形的水平距离	`number` \| `Function<number>`	-
shadowOffsetY	设置阴影距图形的垂直距离	`number` \| `Function<number>`	-
cursor	鼠标样式。同 css 的鼠标样式，默认 'default'。	`string` \| `Function<string>`	'default'